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Copper-containing catalyst as well as preparation method and application thereof

A copper catalyst and catalyst technology, applied in the field of coatings, can solve problems such as not provided, and achieve the effects of improving flexibility, solving slow drying speed, and simple operation

Pending Publication Date: 2021-07-23
MINJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, so far no solution or at least a satisfactory solution to the problem of how to improve the fast curing of natural lacquer films has not been provided in the field of natural lacquer film preparation.

Method used

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  • Copper-containing catalyst as well as preparation method and application thereof
  • Copper-containing catalyst as well as preparation method and application thereof
  • Copper-containing catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] (1) Preparation of cellulose oxide containing aldehyde groups

[0071] Weigh 5.0 g of microcrystalline cellulose, place it in a three-necked flask, add 200 mL of 0.1 mol / L sodium periodate solution, stir in the dark at a constant temperature of 50 ° C, and oxidize for 1.5 h. The product is suction filtered, washed with ethanol, Vacuum drying at 30°C for 24 hours to obtain cellulose oxide containing aldehyde groups.

[0072] (2) Preparation of cellulose-based Schiff base ligands

[0073] Weigh 1.08g of p-phenylenediamine and dissolve it in 30mL ethanol aqueous solution (ethanol: water = 1:2, volume ratio). After it is completely dissolved, add 0.8g of microcrystalline cellulose and continue stirring for 1h at a constant temperature of 60°C. After Schiff base reaction, the product was subjected to suction filtration, washed with ethanol, and dried in vacuum at 30°C for 24 hours to obtain the cellulose-based Schiff base ligand.

[0074] (3) Preparation of cellulose-based...

Embodiment 2

[0077] (1) Preparation of cellulose oxide containing aldehyde groups

[0078] Weigh 5.0 g of microcrystalline cellulose, place it in a three-necked flask, add 200 mL of 0.1 mol / L sodium periodate solution, stir in the dark at a constant temperature of 60 ° C, and oxidize for 1 h. ℃ vacuum drying for 24 hours to prepare cellulose oxide containing aldehyde groups.

[0079] (2) Preparation of cellulose-based Schiff base ligands

[0080] Weigh 1.2g of p-phenylenediamine and dissolve it in 36mL of ethanol aqueous solution (ethanol: water = 1:2, volume ratio). After it is completely dissolved, add 0.8g of microcrystalline cellulose and continue stirring for 1h at a constant temperature of 60°C. After Schiff base reaction, the product was subjected to suction filtration, washed with ethanol, and dried in vacuum at 30°C for 24 hours to obtain the cellulose-based Schiff base ligand.

[0081] (3) Preparation of cellulose-based Schiff base copper complexes

[0082] Weigh 0.6g of anhyd...

Embodiment 3

[0084] (1) Preparation of cellulose oxide containing aldehyde groups

[0085] Weigh 5.0 g of microcrystalline cellulose, place it in a three-necked flask, add 200 mL of 0.1 mol / L sodium periodate solution, stir at a constant temperature of 70 °C in the dark, and oxidize for 0.5 h. The product is suction filtered, washed with ethanol, Vacuum drying at 30°C for 24 hours to obtain aldehyde-containing cellulose oxide.

[0086] (2) Preparation of cellulose-based Schiff base ligands

[0087] Weigh 1.5g of p-phenylenediamine and dissolve it in 50mL ethanol aqueous solution (ethanol: water = 1:2, volume ratio). After it is completely dissolved, add 0.8g of microcrystalline cellulose and continue stirring for 1h at a constant temperature of 60°C. After Schiff base reaction, the product was subjected to suction filtration, washed with ethanol, and dried in vacuum at 30°C for 24 hours to obtain the cellulose-based Schiff base ligand.

[0088] (3) Preparation of cellulose-based Schiff b...

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Abstract

The invention discloses a copper-containing catalyst. The copper-containing catalyst is selected from any one of substances with a structure as shown in a formula I. The copper-containing catalyst is introduced into natural raw lacquer, the synergistic effect of cellulose Schiff base copper and laccase is utilized, urushiol monomers are promoted to be quickly oxidized to generate urushiol quinone free radicals, and the urushiol quinone free radicals are further polymerized to form a high-molecular-weight polymer, so that the purpose of quickly drying the raw lacquer is achieved, and the curing speed of the natural raw lacquer is greatly increased.

Description

technical field [0001] The application relates to a copper-containing catalyst and its preparation method and application, belonging to the technical field of coatings. Background technique [0002] Raw lacquer is a specialty resource in my country, commonly known as "earth lacquer", also known as "national lacquer" or "big lacquer". It is a natural resin cut from the phloem of sumac trees. Raw lacquer has a beautiful appearance, excellent corrosion resistance, wear resistance and durability after being formed into a film, and is often used as a coating in military industry, industrial equipment, shipbuilding, etc. However, due to the shortcomings of raw lacquer such as slow drying time and harsh film-forming conditions (relative humidity 80-90%, temperature 20-30°C), its application range is limited. The drying and film formation of natural lacquer is carried out under the catalytic oxidation of laccase, which is a copper-containing polyphenol oxidase, and the copper ion i...

Claims

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Application Information

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IPC IPC(8): B01J31/22C07C251/08C07C249/02C07H23/00C07H1/00C08B15/05C08B15/06C08B15/02C09D193/00
CPCB01J31/1805C07C251/08C07C249/02C07H23/00C07H1/00C08B15/05C08B15/06C08B15/02C09D193/00C09D7/00B01J2531/16
Inventor 高仁金夏建荣王莉玮林棋
Owner MINJIANG UNIV
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